Main commodities | Ag; Pb |
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Ore minerals | argentiferous galena |
Gangue minerals | calcite; quartz; tourmaline |
Quadrangle map, 1:250,000-scale | CA |
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Quadrangle map, 1:63,360-scale | B-5 |
Latitude | 65.49 |
Longitude | -161.44 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 1,750 feet, 0.2 miles southeast of point 1453 on Weather Ridge. The site is in section 18, T. 1 N., R. 13 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 9, and Miller and Elliott (1969), figure 2, sample location 22. |
Geologic descriptionThis occurrence consists of a galena-bearing calcite vein 1 foot thick that cuts Jurassic-Cretaceous altered andesitic volcanic rocks near the contact with quartz monzonite of the Late Cretaceous Quartz Creek pluton. The alteration is marked by quartz-carbonate replacement, and tourmaline (also see Additional comments). A grab sample of the vein contained: 20 ppm Ag, 200 ppm Cu, 1.5% Pb, and 700 ppm Zn (Miller and Elliott, 1969). | |
Geologic map unit | (-161.442644120633, 65.4893250830396) |
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Mineral deposit model | Sulfides in altered quartz monzonite. |
Age of mineralization | Late Cretaceous. |
Alteration of deposit | Quartz-carbonate replacement and tourmaline. |
Workings or exploration | The area has been mapped and examined by the U.S. Geological Survey and by various exploration companies. |
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Indication of production | None |
Additional commentsThis site is one of numerous occurrences of argentiferous galena, sphalerite, pyrite and arsenopyrite in an 18-mile-long, 2- to 5-mile-wide zone of altered andesite surrounding the Quartz Creek quartz monzonite pluton. The altered zone trends N 15 W, across the drainage basins of Quartz Creek and the Kiwalik River, parallel to prominent lineaments in the area. |
MRDS Number | A013483 |
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References | |
Reporters | Anita Williams (Anchorage, AK) |
Last report date | 1/12/2000 |